#include <iostream>
using namespace std;
const int N = 1010;
int a[N];
int f[N];
int g[N];
int n;
int main() {
    cin >> n;
    int ret = 0;
    for (int i = 1; i <= n; i++) cin >> a[i];
    for (int i = 1; i <= n; i++) {
        f[i] = 1;
        for (int j = 1; j < i; j++) {
            if (a[j] < a[i]) {
                f[i] = max(f[i], f[j] + 1);
            }
        }
    }
    for (int i = n; i >= 1; i--) {
        g[i] = 1;
        for (int j = n; j > i; j--) {
            if (a[j] < a[i]) {
                g[i] = max(g[i], g[j] + 1);
            }
        }
    }
    for (int i = 1; i <= n; i++) {
        ret = max(ret, f[i] + g[i] - 1);
    }
    cout << n - ret << endl;
    return 0;
}